On average, Sasha can drive 28 miles on every gallon of gasoline. Using a proportion, show if she fills up her tank for $2.25 per gallon, how much it will cost her to
drive 336 miles?

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On a piece of paper graft y+2> -3x-3 then determine which answer matches the graph you drew

Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .